Hydrogen-induced reduction of axial stress in optical fiber cores

Ky, N.H., Limberger, H.G., Salathé, R.P., Cochet, F. and Dong, L. (1999) Hydrogen-induced reduction of axial stress in optical fiber cores. Applied Physics Letters, 74 (4), 516-518. (doi:10.1063/1.123172).

Abstract

Radial distributions of axial stress across B/Ge- and Sn/Ge-codoped core fibers and a Corning standard single-mode fiber were measured before and after hydrogen loading under different conditions. A significant reduction of axial stress in the core of all investigated fibers is observed after hydrogen loading. The stress reduction in the core of hydrogen-loaded fibers is irreversible and depends strongly on the core dopants and the fiber drawing tension. The hydrogen-induced core stress reduction is believed to be related to the reactions between hydrogen and drawing-induced defects in the fiber core.

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